Add Trouble for LSP diagnostics display

init.vim

@@ -112,7 +112,7 @@ set mouse=nv
 
 set gfn=DejaVu\ Sans\ Mono\ for\ Powerline:h13
 " from https://stackoverflow.com/a/51424640
-let s:fontsize = 13
+let s:fontsize = 14
 function! AdjustFontSize(amount)
   let s:fontsize = s:fontsize+a:amount
   :execute "set gfn=DejaVu\\ Sans\\ Mono\\ for\\ Powerline:h" . s:fontsize
@@ -122,3 +122,11 @@ noremap <C-Up> :call AdjustFontSize(1)<CR>
 noremap <C-Down> :call AdjustFontSize(-1)<CR>
 inoremap <C-Up> <Esc>:call AdjustFontSize(1)<CR>a
 inoremap <C-Down> <Esc>:call AdjustFontSize(-1)<CR>a
+
+lua << EOF
+  require("trouble").setup {
+    -- your configuration comes here
+    -- or leave it empty to use the default settings
+    -- refer to the configuration section below
+  }
+EOF

mapping.vim

@@ -30,3 +30,10 @@ nnoremap <silent> <Leader>rn <cmd>lua vim.lsp.buf.rename()<CR>
 nnoremap <silent> g[ <cmd>lua vim.diagnostic.goto_prev()<CR>
 nnoremap <silent> g] <cmd>lua vim.diagnostic.goto_next()<CR>
 nnoremap <silent> gE <cmd>lua vim.diagnostic.setloclist()<CR>
+
+" work with Trouble to view lists of diagnostic warnings/ennoremap <leader>xx <cmd>TroubleToggle<cr>
+nnoremap <leader>xw <cmd>TroubleToggle workspace_diagnostics<cr>
+nnoremap <leader>xd <cmd>TroubleToggle document_diagnostics<cr>
+nnoremap <leader>xq <cmd>TroubleToggle quickfix<cr>
+nnoremap <leader>xl <cmd>TroubleToggle loclist<cr>
+nnoremap gR <cmd>TroubleToggle lsp_references<cr>rrors

plug.vim

@@ -13,6 +13,8 @@ Plug 'vim-airline/vim-airline-themes'
 Plug 'mbbill/undotree'
 " Preferred color scheme
 Plug 'fneu/breezy'
+" diagnostics display
+Plug 'folke/trouble.nvim'
 
 
 " files, folders, projects, etc.